Fountain pen



w. J. MCDONALD FOUNTAIN EEN Filed April 26 1920 wir Y i Y INVENTOR.

W/L/M JM DO/VL i ATTORNEY.

Patented Feb. 25, lgclei.

unirse stares WILLIAM Si. MCDNALD,

OF SIOUX CITY, IOJVA.

FOUIJTATN PEN,

Application filed April 26,

To all whom t may concern:

Be it known that l, l/VILLIAM J. Mo- DoNALD, a subject of the King ofEngland, and a resident of Sioux City, in the county of Woodbury andState of lowa, have invented certain new and useful `improvements inFountain Pens, of which the following is a specification.

My present invention aims to provide an improved self-lling fountainpen.

iother object of the invention is the production in a self-filling penof the elastic sack type of improved means for compressing the sack.

A further object of the invention is the 'production of an improved,self-filling fountain pen, comparatively inexpensive in production, yetthoroughly eliicient and depend able in operation.

With these and other objects in view, the yinvention consists in theconstruction, combination and novel arrangement of parts, which will befully understood from the following description, reference being had tothe accompanyingy drawings, which form a part of this application and inwhich like characters of reference indicate corresponding partsthroughout the several views, of which- Fig. 1 is a longitudinal sectionof a fountain pen constructed in accordance with the invention;

Fig. 2 is a similar view, sack being compressed.

Fig. 8 is a plan of the pen. Y

Fig. 4 is a fragmentary plan of the collapsible sack.

Fig. 5 is an enlarged fragmentary side elevation of the presser bar andsaclr.

Fig. 6 is a longitudinal section thereof, taken on the line 6-6 of Fig.5.

Fig. 7 is an enlarged fragmentary elevation of the collapsible sack anda modified form of the presser bar, and

`Fig. 8 is a transverse section taken on the line 8-8 of Fig. 7.

Although l have illustrated and hereinafter described but twoembodiments suitable for practising the invention, l would not beunderstood as being limited to such specific constructions for variousmodifications and alterations may be made in the details of constructionand arrangement of parts herein disclosed without departing from thespirit and scope of the invention as defined in the appended claims.

the collapsible i920. Serial no. 37eme.

Referring now to the illustrations, 9 represents the usual fountain penholder or barrel, having a bore, 10,4 in one end of which is removablyinserted a familiar type of plug, 11, carrying the pen point, 12, andprovided with a duct, 13, which, it will be understood, communicateswith the feed, 14, associated with the pen point.

The barrel encloses an elongated tube, 15, of rubber or other suitableelastic material and in one end of which is inserted the plug, 11. Y

On the top of the tube is cemented or otherwise secured an elongatedmetal strip, 16, which is preferably concave-convex in transversesection, which extends substantially from the free end of the sack tothe end of the plug, 11. ln the preferred form the center of the strip,16, is provided with a longitudinally disposed groove, 17, the bottom ofwhich declines from the ends of the slot on the surface of the strip andtowards the center, forming an angle, 18, at the center of the bottom ofthe groove. immediately above the groove, 17, the barrel, 9, is providedwith a longitudinal slot, 19, in which is positioned a short fingerlever, 20, which osoillates on 'a pivot pin, 21, extending transverselythrough the finger-lever 20, directly above the angle, 18, and has itsend portions embedded in the portions of the barrel at the sides of theslot, 19.

he members, 20 and 21, are so formed and related that the linger-lever,20, normally approximately fills the slot, 19, and by rotation thelinger-lever, 20, may be turned end for end within the slot, andnormally the face of the finger-lever is flush with the periphery of thebarrel, 9.

Vlhe ends of the linger-lever, 20, are grcoved as at 22, and the ends ofthe slot, 19, communicate with relatively short transverse grooves, 23,in the surface of the barrel, 9, to permit the insertion of a personsfinger nail into the grooves, 22, of the fingerlever to facilitateoperation of the fingerlever as will presently appear. Normally, theelastic saclr, 15, holds the presser-bar, 16, against the innerperiphery of the barrel and kagainst the under side of the lingerlever,V20, firmly yet yieldably holding the said linger-lever against movement.

lt will nowr be observed that by turning the finger-lever, 20, to avertical position, as clearly shown in Figure 2, the sack, 20,

will be completely compressed and the air therein expelled. rllhen, byinserting the pen-carrying plug in an ink-well and restoring thefinger-lever, 20, to its normal position, it is clear the sack will becompletely filled with inlr. Obviously, the fingerlever, 20, may belifted at either end, and in its vertical position its lower end seatsin the lowest portion of the groove, 17.

rlhe modification presented in Figures 7 and `8 differs from thepreferred form only in that, in lieu ofthe groove, 17, the centerportion of the presser-bar, 16, is provided with a longitudinal rib 24E,the end portions of which are inclined from the surface of the bar, 16,toward the center of the rib, as at 25, and the ends of the bar, 20, inaddition Ato the grooves, 22, are provided with transverse grooves, 26,disposed at right angles to the grooves, 22, and so formed as toslidably receive the rib, 2li, when the bar, 20, is being moved to avertical position to depress the presser-bar.

It is clear that the irregular surface provided on the presser bar,(that is, the recessed angle, 18, in the preferred forni, and the angledrib, 24, of the modification) serves as a detent which is engaged by thefinger lever and prevents accidental movement of the same beyond itsvertical position.

lt will also be observed that a half revolution of the finger-lever, ineither direction, will compress and fill the tube with ink.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United Stat-es is:

1. A fountain pen including a barrel having a slot, an interior ink sackand a presser bar therefor, a depressing lever arranged in said slot andhaving a central pivot axis whereby the lever may be moved to permiteither end thereof to engage the presser bar to collapse the ink sack.

2. A fountain pen including a barrel having a slot, an interior ink sackand a presser bar therefor, a depressing lever arranged in said slot andhaving a central pivot axis, whereby the lever may move continuously ina circular path to permit opposite ends thereof to alternately engagethe ink sack. Y

3. A fountain-pen embodying a barrel, a collapsible tube therewithin, apresser-bar on the tube, the barrel being slotted longitudinally abovethe presser-bar, and la finger-lever centrallj,7 pivoted in the slot,whereby the ends of the lever may be successively brought into contactwith the presser-bar by rotating the lever in a continuous, circularpath, to compress the tube, the tube being of elastic material to holdthe presser-bar normally yieldably against the barrel and the undersideof the finger-lever, and restore the finger-lever toits normal position.V

al. A fountain-pen embodying a barrel,

a collapsible tube therewitliin, a presser-bar y on the tube, the barrelbeing slotted longitudinally above the presser-bar, and a finger-levercei'itrally pivoted in the slot to rotate in either direction therein ina continuous circular path and alternately engage with its ends thepresser-bar to compress the tube, the tube being of elastic material tohold the presser-bar normally yieldably against the barrel and the underside of the finger-lever, and restore the latter to its normal position.

5. A fountain-pen embodying a barrel, a collapsible tube therewithin, apresser-bar thereon, the barrel being slotted above the presser-bar, anda finger-lever centrally pivoted in the slot to rotatey in a continuouscircular path and successively engage with its ends the presser-bar tocompress the tube, said lever having transverseV horizontal groovesinits ends, and the barrel having recesses to admit a personsfinger-nail into said grooves'. v

In testimony whereof I have hereunto set my hand this 23rd day of April,1920.

WILLIAM J. MenoNALn.

